Based on your previous focus on the installation, debugging, and rapid zero-point positioning of LVDT sensors in hot runner systems, the core impacts of LVDT zero-point position on hot runner systems are as follows:
Needle valve control accuracy: Zero-point deviation directly leads to deviations in the actual closing position of the needle valve, resulting in problems such as incomplete gate closure and leakage, insufficient mold opening stroke, and disrupting precise melt flow control.
Temperature expansion compensation failure: Incorrect zero-point reference will cause complete inaccuracy in the monitoring of thermal expansion displacement in the hot runner system, failing to compensate for structural deformation after heating, leading to runner plate sealing failure and nozzle misalignment.
Production stability: Zero-point anomalies will cause an overall shift in the LVDT's full-stroke displacement data, causing the hot runner closed-loop control system to misjudge the position, frequently triggering alarms and shutdowns, disrupting the normal injection molding production rhythm.
Product quality defects: Abnormal needle valve opening and closing caused by zero-point deviation will directly lead to quality problems such as insufficient glue, flash, and cold runner marks in injection molded parts, significantly increasing the defect rate. Correctly calibrating the LVDT zero point is a core prerequisite for ensuring precise control of hot runner needle valves.
